. "Any process that activates or increases the frequency, rate or extent of myeloid cell differentiation." . . . "positive regulation of myeloid cell differentiation" . "activation of myeloid cell differentiation" . "stimulation of myeloid cell differentiation" . "up regulation of myeloid cell differentiation" . "up-regulation of myeloid cell differentiation" . "upregulation of myeloid cell differentiation" . . . . . .